living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Gastrotricha Metschnikoff, 1864 - gastrotrichs
           Order Chaetonotida Remane, 1925
             Suborder Paucitubulatina d’Hondt, 1971
               1 Family Chaetonotidae Gosse, 1864
               2 Family Dasydytidae Daday, 1905
               3 Family Dichaeturidae Remane, 1927
               4 Family Neogosseidae Remane, 1927
               5 Family Proichthydidae Remane, 1927
               6 Family Xenotrichulidae Remane, 1927